package cn.bdqn.security.util;

import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.stereotype.Component;

import java.security.MessageDigest;

/**
 * @ProjectName: springbootSecurity
 * @Package: cn.bdqn.security.util
 * @Author: huat
 * @Date: 2019/12/13 17:14
 * @Version: 1.0
 * 自定义加密类
 */
@Component
public class MyPasswordEncoder implements PasswordEncoder {
    private static final String SALT = "jzd,.,.";

    /**
     * 加密
     * @param charSequence 需要加密的密码
     * @return
     */
    @Override
    public String encode(CharSequence charSequence) {
        charSequence = charSequence + SALT;
        MessageDigest md5 = null;
        try {
            md5 = MessageDigest.getInstance("MD5");
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        char[] charArray = charSequence.toString().toCharArray();
        byte[] byteArray = new byte[charArray.length];

        for (int i = 0; i < charArray.length; i++)
            byteArray[i] = (byte) charArray[i];
        byte[] md5Bytes = md5.digest(byteArray);
        StringBuffer hexValue = new StringBuffer();
        for (int i = 0; i < md5Bytes.length; i++) {
            int val = ((int) md5Bytes[i]) & 0xff;
            if (val < 16) {
                hexValue.append("0");
            }

            hexValue.append(Integer.toHexString(val));
        }
        return hexValue.toString();
    }

    /**
     * 判断加密后的密码是否一致
     * @param charSequence 需要加密的密码
     * @param password    数据库中加密后的密码，权限框架会直接传入
     * @return
     */
    @Override
    public boolean matches(CharSequence charSequence, String password) {
        String pwd=encode(charSequence);
        if(pwd.equals(password)){
            return true;
        }
        return false;
    }

    public static void main(String[] args) {
        MyPasswordEncoder passwordEncoder=new MyPasswordEncoder();
        System.out.println(passwordEncoder.encode("123456"));
    }
}
